<template>
  <div>
    <!-- 面包屑 导航区域-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 添加用户 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加用户</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="roleslist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <!-- 运用作用域插槽 -->
          <template slot-scope="scope">
            <!-- 渲染权限页面 -->
            <el-row
              :class="['bdbottom',i1 === 0 ? 'bdtop':'','center']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 一级权限渲染  -->
              <el-col :span="5">
                <el-tag closable @close="removeRolesById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>

              <!-- 二三级权限渲染 -->
              <el-col :span="19">
                <!-- for循环 -->
                <!-- 二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '':'bdtop','center']"
                  v-for="(item2,i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRolesById(scope.row,item2.id)"
                    >{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <!-- for循环 -->
                    <el-tag
                      type="warning"
                      v-for="(item3,i3) in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRolesById(scope.row,item3.id)"
                    >{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <pre>
                      {{scope.row}}
                 </pre>
          </template>
        </el-table-column>
        <!-- 索引列 -->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="350px">
          <!-- 运用作用域插槽 -->
          <template slot-scope="scope">
            <!-- 修改 -->
            <el-button type="primary" icon="el-icon-edit">编辑</el-button>
            <!-- 删除按钮 -->
            <el-button type="danger" icon="el-icon-delete">删除</el-button>
            <!-- 分配角色按钮 -->
            <el-button
              type="warning"
              icon="el-icon-setting"
              @click="showSetRightDialog(scope.row)"
            >分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible"
     width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree
        :data="rightslist"
        :props="treeProps"
        show-checkbox
        node-key="id"
        default-expand-all
        :default-checked-keys="defKeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 所有角色
      roleslist: [],
      // 分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      // 所有权限的数据
      rightslist: [],
      //  树形控件属性绑定对象
      treeProps: {
        label: "authName",
        children: "children"
      },
      // 默认勾选的节点数值id数组
      defKeys: [],
      // 当前即将分配权限的角色的id
      roleId:''
    };
  },
  created() {
    // 周期函数 获取权限
    this.getRolesList();
  },
  methods: {
    //    获取权限
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        // console.log(res);
        return this.$message.error("获取权限失败");
      }
      this.roleslist = res.data;
      //   console.log(this.roleslist);
    },
    // 根据id删除相对应的权限
    async removeRolesById(role, rightId) {
      console.log(role);
      // 弹框提示用户是否要删除该权限
      const comFromResult = await this.$confirm(
        "此操作将永久删除该权限, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning"
        }
      ).catch(error => error);
      if (comFromResult !== "confirm") {
        return this.$message.info("取消删除");
      }
      // console.log('hhhh');

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败");
      }
      this.$message.success("删除权限成功");
      // 刷新页面
      // this.getRolesList()
      role.children = res.data;
    },
    async showSetRightDialog(role) {
      this.roleId = role.id;
      // 获取所有权限
      const { data: res } = await this.$http.get("rights/tree");
      // 判断状态码
      if (res.meta.status !== 200) {
        return this.$message.error("获取权限数据失败");
      }
      // 把获取到的权限数据保存到 data 中
      this.rightslist = res.data;
      console.log(this.rightslist);
      // 递归获取三级节点的Id
      this.getLeafKeys(role, this.defKeys);
      // 获取defKeys的id所对应的值
      // console.log(this.defKeys);

      // 分配权限的对话框显示出来
      this.setRightDialogVisible = true;
    },
    // 通过递归的形式，获取角色下所有三级权限的id，并保存到 defKeys 数组中
    getLeafKeys(node, arr) {
      // 如果当前 node 节点不包含 children 属性，则是三级节点
      if (!node.children) {
        return arr.push(node.id);
      }
      // 递归函数循环forEach
      node.children.forEach(item => this.getLeafKeys(item, arr));
    },
    // 监听分配权限对话框的关闭事件 重置defKeys
    setRightDialogClosed(){
      this.defKeys=[]
    },
    // 点击为角色分配权限
    async allotRights(){
      const keys=[
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // 打印获取keys的值-id
      // console.log(keys);
      const idStr=keys.join(',')
      const {data:res}= await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status!==200){
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      // 刷新列表页
      this.getRolesList()
      // 刷新过后并隐藏
      this.setRightDialogVisible=false
    }
  }
};
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.bdtop {
  border-top: 1px solid #eee;
}
.center {
  display: flex;
  align-items: center;
}
</style>